Gasoline tax revenue is falling so fast that the federal government may not be able to meet its commitments to states for road projects already under way, the secretary of transportation said Monday.

The secretary, Mary E. Peters, said the short-term solution would be for the Highway Trust Fund’s highway account to borrow money from the fund’s mass transit account, a step that would balance the accounts as highway travel declines and use of mass transit increases. Both trends are being driven by the high price of gasoline and diesel fuel.

(Just for kicks, check out Transportation Secretary Mary Peters’ quote about things that are “not really transportation,” like bike paths. Might I humbly mention that I used just such a path for my commute this morning?)